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Ravi set up an experiment as shown in the given figure.The figure shows five identical balls being suspended on a rod by strings of different lengths. Ravi then cut all five strings at the same time and the balls were allowed to fall freely to the ground.

Which of these statements holds true for this experiment?

ABall ‘b’ had the greatest impact on the ground.
BBall ‘a’ had less gravitational potential energy than ball ‘c’ at the start.
CBall ‘d’ had the most gravitational potential energy at the start.
DBalls ‘a’ and ‘e’ had different amounts of gravitational potential energy at the start due to their different positions along the rod.

Which of the following statements are true about acid rain ?
(i) Acid rain has harmful effects on the living beings.
(ii) Acid rain mainly comprises of H₂SO₄ and HNO₃.
(iii) Greenhouse gases are mainly responsible for causing acid rain.
(iv) Acid rain causes damage to buildings.

A (i) and (ii) only
B (i) and (iii) only
C (i), (iii) and (iv) only
D (i), (ii) and (iv) only

Kirti kept a metal spoon in a glass jar filled with pickle for a few days. She observed that there were holes in the spoon. What could be the possible reason for this?

A Oil present in pickle dissolves the metal.
B Oil present in pickle liberates a gas in which metal gets dissolved.
C Metal reacts with acid present in pickle to form salt hence, metal gets dissolved.
D The glass reacts with metal to give acid which dissolves the metal.

Who among the following made the wrong statements?


A Divya and Nandini
B Richa and Nandini
C Divya, Richa and Nandini
D None of these

Match the columns and select the correct option from the codes given below.


A a - iii, b - ii, c - iv, d - i
B a - ii, b - iv, c - i, d - iii
C a - iv, b - ii, c - iii, d - i
D a - i, b - ii, c - iii, d - iv.

If Jug , Kettle ,

Barrel , then ______ jugs are needed to fill an empty barrel.

(A) 5

(B) 4

(C) 3

Select a figure from amongst the Answer figures which will continue the same series as established by the five problem figures.


A

B

C

D

A land breeze blows when the air above land is ___________ and the air above sea is ____________.

A Colder, Warmer
B Warmer, Lighter
C Heavier, Colder
D Warmer, Colder

Three organisms possess some of the characteristics shown in the chart below. An X indicates the characteristic that is present. Which statement best describes these organisms?


AA could be an alga, B could be an Amoeba, and C could be a Paramecium
BA could be a plant, and B and C could be coelenterates
CA could be a yeast, and B and C could be bacteria
DA could be a moss, B could be a Hydra, and C could be an earthworm

Preeti was playing on swing and suddenly fell down. She got an injury in her chest. Now she has difficulty in breathing and she is also complaining of pain in chest while laughing, yawning, etc. Which of these body organ has been damaged?

A
B
C
D